Select the Email Campaign you want to print statistics for (Fig 1).

Fig 1

Choose the Print action and click on the Go button (Fig 2). 

Fig 2

Select which statistics you'd like to Print (Fig 3). To Preview how the print-out will look, click the Preview button (Fig 4). 

Fig 3

Fig 4

When you're ready to Print, click the Print button (Fig 5). You'll be redirected to the default print dialog for your web browser. Click on Print to print the document. 

Fig 5